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-rw-r--r--lib/aes.go14
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/aes.go b/lib/aes.go
index 9440b52..a388db8 100644
--- a/lib/aes.go
+++ b/lib/aes.go
@@ -98,6 +98,20 @@ func aesInvSubBytes(state [][]byte) [][]byte {
return state
}
+func aesShiftRows(state [][]byte) [][]byte {
+ n_state := make([][]byte, 4) // New state.
+
+ nb := 4
+ for r := 0; r < 4; r++ {
+ n_state[r] = make([]byte, nb)
+ for c := 0; c < nb; c++ {
+ n_state[r][c] = state[r][(c+r)%nb]
+
+ }
+ }
+ return n_state
+}
+
func aesInvShiftRows(state [][]byte) [][]byte {
n_state := make([][]byte, 4) // New state.